Which part of ovary in mammals acts as an endocrine gland after ovulation?a)Vitelline membraneb)Graffian folliclec)Stromad)Corpus luteumCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Coz it secretes progesterone

Answer

Release of ovum from the ovary is called ovulation. The Graafian follicle rises to the surface; sends out a protuberance or stigma and everts to release the ovum Into peritoneal cavity. The empty Graafian follicle contains a blood clot which is called corpus haemorrhagic Its granulosa cells continue to proliferate, develop yellow carotene pigment or lutein and get converted into lutein cells. This converts the ruptured follicle into yellow body called corpus luteum. It becomes a temporary endocrine gland secreting progesterone with small quantity of estrogen.

Answer

After ovulation , graffian follicle is changed into corpus luteam which secretes projestrone(max) , estrogen , relaxin and inhibin hormone that's why corpus luteam act as endocrine gland

Answer

DDD

Answer

Corpus luteum have endocrine role develp after ovulation.

Answer

The correct answer is option 'D', the corpus luteum. After ovulation, the mature Graffian follicle in the ovary transforms into a structure called the corpus luteum, which acts as an endocrine gland in the mammalian reproductive system.

Corpus Luteum:
- The corpus luteum is a temporary endocrine gland that forms in the ovary after the release of an egg during ovulation.
- It is derived from the remnants of the ruptured Graffian follicle.
- The corpus luteum secretes several hormones, including progesterone, estrogen, and inhibin.

Functions of Corpus Luteum:
1. Progesterone Secretion:
- The main function of the corpus luteum is to produce and secrete progesterone, which is essential for preparing and maintaining the uterus for pregnancy.
- Progesterone helps in thickening the uterine lining (endometrium) and promotes the growth of blood vessels, glandular tissues, and mucus-secreting cells in the uterus.
- It also inhibits uterine contractions, preventing premature shedding of the endometrium.

2. Estrogen Secretion:
- The corpus luteum also produces and releases estrogen, although in smaller quantities than the ovaries.
- Estrogen helps to maintain the uterine lining and supports the growth and development of secondary sexual characteristics.

3. Inhibin Secretion:
- The corpus luteum secretes inhibin, a hormone that inhibits the production of follicle-stimulating hormone (FSH) from the pituitary gland.
- Inhibin helps regulate the menstrual cycle by preventing the development of new follicles in the ovary, thereby suppressing superfluous ovulation.

Lifespan and Degeneration:
- If fertilization and implantation of the fertilized egg occur, the corpus luteum continues to function, producing progesterone to support the early stages of pregnancy until the placenta takes over hormone production.
- If fertilization does not occur, the corpus luteum has a limited lifespan of about 10-14 days.
- Without pregnancy, the corpus luteum undergoes degeneration and transforms into a nonfunctional scar tissue called the corpus albicans.

Summary:
After ovulation, the Graffian follicle transforms into the corpus luteum, which acts as an endocrine gland in the mammalian reproductive system. The corpus luteum secretes progesterone, estrogen, and inhibin, which are important for preparing and maintaining the uterus for pregnancy. If fertilization does not occur, the corpus luteum degenerates and forms the corpus albicans.

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